Designation
| Name |
The value |
| Designation GOST Cyrillic |
15ХА |
| Designation GOST Latin |
15XA |
| Transliteration |
15HA |
| By chemical elements |
15Cr |
Description
15KHA steel is used: for the manufacture of bushings, fingers, gears, rollers, pushers and other carburized parts, which required high surface hardness with a low strength of the core; parts operating in conditions of wear by friction.
Note
Steel construction high quality chrome.
Standards
| Name |
Code |
Standards |
| Bars and shapes |
В32 |
GOST 4543-71, GOST 14955-77, TU 14-1-2118-77, TU 14-1-950-74, TU 14-1-3238-81, TU 14-11-245-88, TU 14-1-3238-2006, TU 14-136-367-2008 |
| Bars and shapes |
В22 |
GOST 8319.0-75 |
| Blanks. Of the workpiece. Slabs |
В31 |
OST 3-1686-90, TU 14-1-4944-90, TU 1-92-156-90 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
V |
Ti |
Mo |
W |
| TU 14-1-950-74 |
0.12-0.17 |
≤0.025 |
≤0.025 |
0.4-0.7 |
0.7-1 |
0.17-0.37 |
≤0.3 |
Rest |
≤0.25 |
≤0.05 |
≤0.03 |
≤0.15 |
≤0.2 |
| GOST 4543-71 |
0.12-0.17 |
≤0.025 |
≤0.025 |
0.4-0.7 |
0.7-1 |
0.17-0.37 |
≤0.3 |
Rest |
≤0.3 |
≤0.05 |
≤0.03 |
≤0.15 |
≤0.2 |
Fe is the basis.
GOST 4543-71 regulates the content of high-quality steel: P≤0,025%; S≤0.015%; Сu≤0.25%.
According to TU 14-1-3238-81 for grade 15ХА-СШ the content of S≤0.015%.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
KCU, kJ/m2 |
HB, MPa |
| Bars and strip hot rolled and forged. Quenching in oil with 840-880 °C + quenching in oil from 780-820 °C + vacation at 150-170 °C, air cooling |
| 15 |
≥393 |
≥589 |
≥15 |
≥50 |
≥880 |
170-302 |
| Bars and stripes. Quenching in oil, 860-900 °C + Vacation at 150-170 °C, air cooling |
|
≥390 |
≥590 |
≥15 |
≥50 |
≥882 |
170-302 |
Description mechanical marks
| Name |
Description |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σU |
Limit short-term strength |
| d5 |
Elongation after rupture |
| y |
The relative narrowing |
| KCU |
Toughness |
| HB |
Brinell hardness number |
